Shaiban, proofing process and standardized quality management (6)

1. Pay attention to ink treatment

The PS plate obtained by ink treatment can increase the photosensitivity of the photo-resist layer, and protect the graphic part so that it can be quickly inked during printing and proofing. At the same time, the photo-smoothing effect of the photo-developed ink can be prevented and the graphic part can be prevented. Light response, prolong the use of the printing plate, and ink is also beneficial to improve the printing rate. Therefore, in addition to rushing to print on the machine, it should adhere to the ink processing, operation should pay attention to the ink must be raised, the layout can not afford to clean dirty.

2. Paying attention to the version

After the fixed PS plate is washed and dried, it can be baked on the machine, so that the adhesive layer developed by the alkaline solution is heated to stabilize, so that the residual alkali solution is volatilized by heat, so that the PS plate after processing is illustrated. Some of them have good lipophilic properties, fast ink extraction, and high printing rate. During the operation, attention should be paid to the stencil that has been subjected to the forging treatment. Before the ink is removed, the plate must be cooled and have a certain amount of moisture. If necessary, a thin second layer of glue can be applied to prevent the ink from winning.

3. Pay attention to the environment and maintenance of the machine

1 The studio environment should be clean, especially the plate glass, must be cleaned before work, and the development machine should be regularly cleaned and maintained.

2 Light source and illumination should be checked regularly. Voltage, grid inspection, 380V (360-400V).

The storage area for the 3PS version should be installed in an air-cooled dark room or a place where the temperature is low and it is dry, in particular avoiding the water tank. When using the PS version, be careful not to bend or scratch. Take care not to touch the surface with hands covered with oil or developer.

4. Pay attention to using phosphoric acid solution

The manually developed plates were treated with 2% to 3% phosphoric acid. Because the exposed part of the sensitizer after development is removed by the developer, the part of the image that does not have light is not eroded by the developer and remains on the plate, and is photosensitive. A 2% to 3% dilute phosphoric acid solution is used. Fixing, which neutralizes the surface of the alkaline plate, stabilizes the graphic part. During operation, it should be noted that do not use phosphoric acid treatment just after it is taken out of the developing plate, rinse it with clean water, rinse the developer and then process it.

5. Pay attention to the removal process

When developing the PS plate for Chen Sheng, it is generally adopted when it is wet, and although this method is easy to remove, it may be dirty due to some deficiencies in the previous development. The best way is to first wipe a thin layer of glue, after drying, as if it is not dry, and then remove the dirty effect is good, the layout is not clean and play a certain role.

6. Pay attention to squeegee

Operation should pay attention to wipe the glue thin and even, effectively play a role in protecting the layout, and often do not pay attention to this work in daily production, glue thickness and inconsistency, and even wipe is not complete, resulting in The plate is partially damaged.





Source: Bison